Damper.



G. WOLF.

DAMPER.

APPLICATION FILED MAR. 25, 1914.

Patented July 14, 1914.

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GUSTAV WOLF, OF NEW YORK, N. Y.

DAMPER.

Specification of Letters Patent.

Patented July 14:, 1914.

Application filed March 25, 1914. Serial No. 827,140.

nace attachment or combustion generator.

described and claimed in my prior Patent- 781,483, dated January 81,1900.

The object of the invention is to provide regulation combustion chamberof a heater or stove, so as to insure a proper combustion by a m ngl ngof the oxygen of the atmospheric air with before the latter es- 1 capethrough the smoke pipe and flue, and 5 at the same time permitting theescape of non-combustible gases and preventing the for a very minuteadjustment or of the draft in the furnace, steam boiler,

the combustible gases same from being discharged into the rooms orbuilding being heated and thereby avoid:

ing the casualties and disagreeable odors shown as provided with anopening 12 at which otherwise result.

Another object of the invention is to pro- 1 which is provided with anattachment or auxiliary damper covide an improved damper operating withopenings therein so that when the main closed in a position to otherescape passage, the auxiliary damper can be set to further regulate thedegree of draft and prevent the entrance of cool air over the fire bedin a combustion chamber, thereby permitting a maximum quantity of heatderivation consistent with a minimum,

rable and efficient in operation and not likely to get out of workingorder.

Reference is to be had to the acoompanying drawings forming a part ofthis speoidamper or damper plate is close a smoke pipe or iication, inwhich similar characters of reference indicate corresponding parts inall the views, and in which Figure 1 is a side elevation of a heatingfurnace havingv its smoke pipe equipped with the improved damper, Fig.2is an enlarged sectional view taken longitudinally of the smoke pipe andvertically through the damper; Fig. 3 is a sectional view taken at rightangles to Fig. 2 and showing the damper in elevation.

' While the present invention is especially adapted for use with myprior device as above mentioned by reason of the novel and desirablearrangement for supplying air in a heated condition directly over theproducts of combustion, whereby there is a complete mingling of theairwith the gases to insure the burning of the combustible gases, thedevice is adapted for other uses in a smoke or draft pipe.

In illustrating the application of the invention a conventional form ofheating furnace 10 is shown, from the combustion chamber of which asmoke pipe 11 extends for communication with the uptake or flue in orderto discharge the smoke and noncombustible gases. This smoke pipe is oneside adjacent to the furnace over which a laterally extending casing 13is secured, said casing having a closure plate 14 which closes bygravity and is commonly used as a check to regulate the draft.

WVhether or not the furnace or smoke pipe is provided with the draftregulator described in my patent, it is found that the carbon monoxid orcarbonic oxid and other light gases of a combustible nature which areformed when carbon is burnt with a limited supply of oxygen or wherecarbon dioxid meets with an excessive carbon at a red heat, such gasesescape into the furnace room and also pass into the rooms or buildingwith the heatedair and the result is the disagreeable odors from some ofthe gases, while carbon monoxid'gas although colorless and possessingneither taste nor smell, causes death if inhaled in comparatively smallquantities. The present invention is designed to overcome theseobjections, and as illustrated the damper comprises a main damper plate15 corresponding to the interior cross section of the smoke pipe andprovided with apertured extensions 16 on one side with rectangularapertures receiving an operating rod 17 having a handle 18 locatedexteriorly of the smoke pipe for turning the damper plate to therequired angle in regulating the draft. A concavely arcuate notch 19 isalso provided in the pe-- ripheral edge of the damper plate at the topof the latter for the purpose of permitting or maintaining a slightdraft when the damper is moved to an upright position'to close the smokepipe and atthe same time to permit the lighter and non-combustibledangerous gases to escape at the top of the smoke pipe while a whirlingmotion is cre- V patent.

ated at the center of the damper, causing the return of the heavier andcombustible gases to the combustion chamber to be burned. In thisoperation of the device it is essential that some auxiliary inlet forair to the combustion chamber be provided and thus the specialadaptation of the damper to a furnace equipped with an attachment orcombustion generator set forth in my prior In addition to the notch 19the damper plate 15 is provided with apluralvice which provides meansfor obtaining ity, preferably a pair, of apertures 20-,preferably'located above and below the vertical center of the damperplate through which the damper rod 17 extends so as to lie above andbelow this rod and to dispose the apertures in spaced relation adistance at least equal to the diameter of each. Onthe face of thedamper plate disposed toward the check deaccess to the interior of thesmoke pipe, is

an auxiliary damper which consists of a flat plate 21 having a pair ofapertures 22 corresponding in diameter to the diameters of the apertures20 and spaced apart the same distance. This plate 21 is provided withaslot 23 adjacent one corner and near its lower end, whereby the plate isslidably held "on the main damper by engagement of a headed member 2 1therethroughJ This fastening member consists of a rivet or screw securedto the main damper and passing through the slot with its head contactingwith the face of the plate 21 so as to permit vertical adjustment ofsaidplate on the plate 15. The plate 21 is further provided with averticalslot 25 near its upper end through which a screw 26 carried bythe plate 15 extends, while a nut 27, preferably in the form of a wingnut, is engaged on the screw and is designed to be brought intofrictional engagement with the plate 21 to hold the latter in anadjusted position with relation to theplate 15 and regulate I therelative positions of the openings of the two plates to control thedraft of the furnace. The upper end of the plate 21 of the auxiliarydamper is convexly arcuate, as shown at 28, so as to conform to theinterior face Of-the smoke pipe and operate to regulate the size of theopening provided by the notch 19 between the edge wall of said notch andthe inner face of the smoke pipe. Thus it will be seen that access maybe had to the interior of the smoke pipe by raising the cover or closure14 or adjusting the auxiliary damper on the main damper by operation ofthe wing nut 27 and this can be done without danger of burning the handsby regulating the draft on the furnace. Also, when the damper isvertically disposed, as shownin Fig. 2 of the drawings, with theopenings or apertures of the auxiliary damper in alinement. with themain damper the carbon monoxid and like gases will escape through theopeningprov'ided H by the notch-19, these gases naturally as- 3 cendingand hugging the top wall of the smoke pipe after being given ofi fromthe products of combustion in the combustion chambenwhile air issupplied through the apertures to commingle with the heavier andcombustible gases in such a manner as to create a whirling motiontending to 1'9, turn such combustible gases with the, airin a highlyheated condition to the combustion chamber to be consumed. lVh'en thepipe is vertical and the damper horizontally disposedor shifted from theposition shown in Fig. 2, the light gases through a whirling motionescape through the apertures, while fresh air is supplied around themain damper, thus permitting the escape of the nonper having a notch inits edgeportion and a plurality of openings therethrough; of a plateslidable on the damper and held from rotation and having a correspondingnumber of openings to aline at times with the first mentioned openings,one end of the plate being rounded to cooperate with the edge notch forvarying the size thereof or close the same, adjustment of the plate serving to simultaneously coveror uncover the openings andnotch, and meansfor holding the plate in an adjusted position on the damper. 1

2. The combination with a smoke pipe leading'from the combustion chamberof a furnace or the like and means for obtaining access thereto; of adamper pivoted in the pipe and adapted to be turned from the exteriorthereof, said damper having openings therethrough near its center and anotch in its upper edge substantially in alinement therewith, anauxiliary damper slidably connected to the first mentioned damper incontact with one face of the same and having openings of correspondingnumher and size cooperating with the first mentioned openings and aconvexly arcuate upper edge cooperating with the notch, and an adjustingmember for frictionally holding the auxiliary damper at variouspositions of adjustment on the first mentioned damper to regulate thesizes of the openings and notch or close the same, said damper whenvertically disposed in a horizontal pipe with the openings and notchuncovered permitting the lighter gases to escape through the notch whileair is supplied through the openings, whereas when the damper ishorizontal in a vertical pipe the light gases will escape through theopenings while the fresh air is supplied through the notch in each caseto combine with the heavier and combustible gases to be consumed.

3. The combination with a smoke pipe leading from the combustion chamberof a heater and av damper mounted in the pipe and having a notch in itsupper edge, said damper being adapted to be set at different angularpositions in'the smoke pipe and having openings therethrough near itscentral portion; of a plate having openings corresponding with theopenings in the damper and having vertical slots therein. means carriedby the damper and engaged through the slots for slidably retaining theplate thereagainst, the upper edge of the plate cooperating with thenotch, and a binding nut for holding the plate in an adjusted positionwhereby when the damper is closed and the plate adjusted the light andnon-combustible gases will escape therethrough while the heavier andcombustible gases will return to the combustion chamber whereas when thedamper is set at an angle the lighter gases will escape around the samewhile atmospheric air will, through a whirling motion with the heavierand combustible gases, cause the latter to return to the combustionchamber.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GUSTAV WOLF.

Witnesses:

JOHN E. BURCH, GEORGE H. EMSLIE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

